Razor knife blade



FIG. 1 is a perspective view of a razor knife blade showing our new design;

FIG. 2 is a side view of the razor knife blade, the opposite side being a mirror image thereof;

FIG. 3 is an top view of the razor knife blade;

FIG. 4 is a bottom view of the razor knife blade;

FIG. 5 is a front view of the razor knife blade; and,

FIG. 6 is a rear view of the razor knife blade. 

The ornamental design for a razor knife blade, as shown and described. 